Patent US2999562A successfully refreshed from Google Patents.
US2999562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner
Assignee: Briggs and Stratton Corp
•
Filing: 1960-03-24
•
Granted: 1961-09-12
•
Expires: 1980-03-24
Abstract
No abstract record available.
Inventors
- 👤 Leo J Lechtenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:08
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04; B; B01; B01D; B01D46/00; B01D46/10; F02M35/024; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S55/00; Y10S55/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |